| Sources |
- [S276] Pennsylvania, Allegheny County, 1850 U.S. Census Population Schedule, Pennsylvania, Allegheny County, (https://www.familysearch.org/search/collection/1401638: National Archives and Records Administration, 2016), M432, Pine Township, p. 338 (stamped), dwelling 35, family 35, Jon Grubbs, accessed 4 Apr 2020 (Reliability: 2).
- [S282] Pennsylvania., Pennsylvania -- Probate Records 1683-1994, (FamilySearch. http://familysearch.org : 2014.), Jacob Grubbs will; (http://familysearch.org : accessed 7 Apr 2020) (Reliability: 4).
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